Вопрос школьника по предмету Математика
Швидкість товарного поїзда дорівнює 54 км/год. Яка довжина цього поїзда якщо повз нерухомого спостерігача він проходить за 12 с?
Ответ учителя по предмету Математика
1 година=3600 секунд
54 км — 3600 с.
х км — 12 с
х=54*12/3600=0,18 км=180 м — довжина поїзда
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